Journal
APPLIED SURFACE SCIENCE
Volume 351, Issue -, Pages 320-326Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2015.05.152
Keywords
Teardrop shaped; Core-shell; SiO2/TiO2 nanoparticles; Photocatalytic activity
Categories
Funding
- National Natural Science Foundation of China [51403003, 51303001]
- Anhui Provincial Natural Science Foundation [1408085ME86, 1508085QE105]
- Scientific Research Fund of Anhui Provincial Education Department [KJ2013A014]
- Startup Foundation for Doctors of Anhui University
- Anhui Province Institute of High Performance Rubber Materials and Products
- 211 Project of Anhui University
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In this study, teardrop-shaped SiO2/TiO2 nanoparticles (TST-NPs) with core-shell structure were fabricated from tetraethoxysilane (TEOS) and tetrabutyl titanate (TBT) by sol-gel method. And these nanoparticles were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy. Photocatalytic activity of teardrop-shaped SiO2/TiO2 nanoparticles after calcination (CST-NPs) was studied towards degradation of methylene blue under sunlight irradiation. The result showed that CST-NPs possessed good photocatalytic activity. The photocatalytic mechanism was also studied by adding different capture agent. Results showed that addition of 0.003 M of I- decreased the degradation of MB more than same amount of Ag+, indicating that the photogenerated holes may play a more essential role than photoinjected electrons in the oxidation of MB. (C) 2015 Elsevier B.V. All rights reserved.
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